<header class='navbar navbar-fixed-top navbar-inverse'>
  <div class='container'>
    <%= link_to 'sample app', root_path, id:'logo' %>
    <nav>
      <ul class='nav navbar-nav navbar-right'>
        <li><%= link_to 'Home', root_path %></li>
        <li><%= link_to 'Help', help_path %></li>
        <% if logged_in? %>
          <li><%= link_to 'Users', '#' %></li>
          <li class='dropdown'>
            <a href='#' class='dropdown-toggle' data-toggle='dropdown'>
              Account
              <b class='caret'></b>
            </a>
            <ul class='dropdown-menu'>
              <li><%= link_to 'Profile', current_user %></li>
              <li><%= link_to 'Setting', '#' %></li>
              <li class='divider'></li>
              <li><%= link_to 'Log out', logout_path, method:'delete' %></li>
            </ul>
          </li>
        <% else %>
          <li><%= link_to 'Log in', login_path %></li>
        <% end %>
      </ul>
    </nav>
  </div>
</header>